When beams of light pass through a fiber optic cable, they tend to degrade.

当光束通过光纤，光强度趋于降低。

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A scanner replaces the human eye, and channels light through a fiber-optic cable to a spectral contents analyzer spectrophotometer, as shown in Figure 2.

扫描仪可以取代人眼，渠道光透过光纤电缆，一谱内容分析仪分光光度计，如图2所示。

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Implicit in this vision is the Utopian fantasy that underlies most high-tech futurism: once Africa puts this infrastructure in place, all of its problems--tribalism, racism, poverty and disease--will disappear in the purifying light of a fiber optic cable.

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When a pulse of light is sent into the tumor using fiber optic cable that is threaded into a tumor using a biopsy needle, the molecule absorbs the light energy, converts it electrical energy that then causes tumor cells to self destruct.

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